AvaloniaProject/AvaloniaApplication4/Views/ActionPages/EditAndAddSubject.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable="d" d:DesignWidth="1000" d:DesignHeight="990"
             x:Class="AvaloniaApplication4.Views.ActionPages.EditAndAddSubject"
			 xmlns:vm="using:AvaloniaApplication4.ViewModels"
			 x:DataType="vm:EditAndAddSubjectViewModel"
			 Background="White"
			 Padding="80">
	<ScrollViewer>
		<StackPanel Orientation="Vertical" HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="0 20 0 0">
			<TextBlock Margin="0 0 0 39" Text="Предметы" Classes="titleStyle" FontWeight="Bold"/>
			<TextBox Text="{Binding Subject.NameSubject}" Margin="0 0 0 22" Watermark="Наименование предмета"/>
			<TextBlock Margin="0 0 0 13" Text="Код предмета" Classes="litleText"/>
			<ComboBox ItemsSource="{Binding CodeAcademicSubjects}" SelectedItem="{Binding Code, Mode=TwoWay}" Margin="0 0 0 22" HorizontalAlignment="Stretch">
				<ComboBox.ItemTemplate>
					<DataTemplate>
						<TextBlock Text="{Binding IdCodeAcademicSubjects}"/>
					</DataTemplate>
				</ComboBox.ItemTemplate>
			</ComboBox>
			<TextBlock Margin="0 0 0 13" Text="Учебный стандарт" Classes="litleText"/>
			<ComboBox ItemsSource="{Binding TrainingStandartList}" SelectedItem="{Binding TrainingStandart, Mode=TwoWay}" Margin="0 0 0 22" HorizontalAlignment="Stretch">
				<ComboBox.ItemTemplate>
					<DataTemplate>
						<TextBlock Text="{Binding NameTrainingStandart}"/>
					</DataTemplate>
				</ComboBox.ItemTemplate>
			</ComboBox>
			<Grid Margin="0 0 0 30">
				<Grid.ColumnDefinitions>
					<ColumnDefinition Width="1*"/>
					<ColumnDefinition Width="1*"/>
				</Grid.ColumnDefinitions>
				<Button HorizontalAlignment="Stretch" Margin="5" Content="Сохранить предмет" Command="{Binding $parent[UserControl].((vm:EditAndAddSubjectViewModel)DataContext).Save}" Grid.Column="0"/>
				<Button IsEnabled="{Binding IsNotNew}" HorizontalAlignment="Stretch" Command="{Binding $parent[UserControl].((vm:EditAndAddSubjectViewModel)DataContext).Delete}" Margin="5" Content="Удалить предмет" Grid.Column="1"/>
			</Grid>
			<Button HorizontalAlignment="Stretch" Command="{Binding $parent[UserControl].((vm:EditAndAddSubjectViewModel)DataContext).GoBack}" Content="Вернуться назад"/>
		</StackPanel>
	</ScrollViewer>
</UserControl>